TUNAIR™ polypropylene Erlenmeyer shake flask, 2.5 Liters, No-Baffle

Model Number SS-5011

  • Item Description
  • Accessories
  • Specifications
  • Technical Information
  • Normal throw
  • Constructed of polypropylene

The TUNAIR™ polypropylene Erlenmeyer flask systems are a unique and patented flask and closure system, designed for microbiology and biotechnology applications. The No-Baffle Shake Flask has a normal throw similar to a standard Erlenmeyer flask.

The flasks are constructed of polypropylene and resistant to most solvents.

All TUNAIR™ flasks and caps can be cleaned by soaking in water with a light detergent solution to loosen dirt and contaminants, then air dry.

Additional options are available that come with caps and filters.

Silicone Filters:


Dri-Gauze Filters:




Flask Dimensions:
Flask Size: 2.5L
Working Volume: 1L
Base Diameter: 6.50” [16.51cm]
Neck Diameter: 3.00” [7.62cm]
Height: 10.75” [27.31cm]

Height With Cap in Place = 12.75"
Weight: 0.02 lbs. [0.008Kg]

No-Baffle (0 Baffles): Normal Throws

Shaker Speed:
1” Throws: 300-400rpm or possibly higher
2” Throws: 150-200rpm or possibly higher

All TUNAIR flasks and caps are constructed of chemical resistant polypropylene. All flasks and caps are fully autoclavable.

All TUNAIR flasks and caps can be cleaned by soaking in water with a light detergent (i.e. Joy) solution to loosen dirt and contaminants; air dry. All TUNAIR flasks and caps can be autoclaved, if required.

Cell Growth Evaluation of Commonly Used Shake Flasks

TUNAIR™ flasks were compared to conventional flasks using four different types of microorganisms; Escherichia coliSaccharomyces cerevisiaePenicillium avellaneum, and Streptomyces chartreusis. The aeration capacities of the shake flasks were determined by the sulfate oxidation method, and the values shown below are presented as oxygen absorption rate (OAR) in mM oxygen/L/Min. The growth rates of E.coli and S.cerevisiae were expressed as optical densities (OD) at 555mM. For S.chartreusis and P.avellaneumgrowth rates were evaluated by percent sedimentation. For E.coli and S.cerevisiae, the growth rates were determined after an 18-hour incubation period; for S.charteusis, a 24-hour incubation period; and for P.avellaneum, a 72-hour incubation period. Growth and OAR evaluations were carried out with 3-9 replicates and statistically analyzed using Turkey’s w-procedure. See results below.

Growth Evaluation of Four (4) Microbial Types in TUNAIR™ Flasks vs. Other Currently Used Shake Flasks
OAR Value OD @ 555mM % Sedimentation
Flask mM O2/L/Min. E.coli S.cerevisiae S.chartreusis P.aveilaneum
TUNAIR™ Full-Baffle 4.25 7.09 5.63 19.7 3.3M
TUNAIR™ Half-Baffle 1.22 5.36 5.57 27.73 30.50P
Triple Indented Flasks 2.47 5.97 5.31 19.20 9.50MP
Unbaffled Erlenmeyer 0.52 5.97 5.19 17.37 25.10P

*Growth Morphology: M, mycelial; P, pellet; MP, mixed mycelial. The mycelial growths mostly adhered to the walls of the flask, which accounted for the low overall sedimentation value.

Reference Papers:

1.Method to Increase the Yield of Eukaryotic Membrane Protein Expression inSaccharomyces Cerevisiae

2.Optimisation of Recombinant Production of Active Human Cardiac SERCA2a ATPase

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